I made a website for the Positive Parenting Program of the Manitoba Government while working at Canada’s Web Shop, and it had videos on one of the pages. Because the videos are self-hosted, I used the excellent JWPlayer for WordPress plugin, and it worked great except that when the staging site was brought down the videos stopped working.

It turns out that JWPlayer for WordPress is using WordPress guids instead of using the wp_get_attachment_url() function that makes it safe to move your WordPress website between domains. In short, the guid column in the posts table stores the original URL of the video, and if you change domains, the only way to get the correct URL is to use the aforementioned function.

I wrote a little patch, notified LongTail Video, and it is on its way to being included in the plugin.